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    <meta charset="UTF-8">
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    <title>vue中的数据代理是如何实现的</title>
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    <h3>
        通过代码来说明vue中的数据代理
    </h3>
    <p>
        也就是实现这条线：
        <br>
        data <====> vm._data <====> vm
    </p>
    <script>
        let data = {
            name: 'dilireba'
        }
        let vm = {
            _data: {}
        }
        
    </script>
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